Here is the full list of all 51 Persona 4: Arena trophies - there are 42 bronze, 5 silver, 3 gold and 1 platinum.
You have mastered P4A.
You have seen all the Story endings.
Elizabeth's Story chapter has been told.
You have completed all the Challenges! Funky Student would be proud.
Mystery Food X is yours!
You were afflicted with every ailment in Arcade Mode or online. Not even Mr. Edogawa can help you.
You have reached Level 30 by playing online matches!
You have completed 100 online matches, win or lose. No bear puns here. Congrats.
You've battled against every character in online matches. You're a grizzly'd warrior now!
Mitsuru's Story chapter has been told.
Akihiko's Story chapter has been told.
Aigis' Story chapter has been told.
Teddie's Story chapter has been told.
Naoto's Story chapter has been told.
Kanji's Story chapter has been told.
Yukiko's Story chapter has been told.
Chie's Story chapter has been told.
Yosuke's Story chapter has been told.
Yu's Story chapter has been told.
Labrys' Story chapter has been told.
You completed Score Attack Mode with all characters.
You completed Arcade Mode with all characters.
You used every character's Instant Kill move in Arcade Mode or online!
You have used all the characters in Arcade Mode or Online. Variety is good for you!
You completed Score Attack Mode with one character.
You completed Stage 6 in Score Attack.
You performed 100 Furious Actions in Arcade Mode or online.
You performed 100 All-Out Attacks in Arcade Mode or online.
You performed 20 One More Bursts in Arcade Mode or online.
You created 10 Persona Breaks in Arcade Mode or online.
You performed 30 Fatal Counters in Arcade Mode or online.
You won 30 Rounds in Arcade Mode or Online by using SP Skills or Awakened SP Skills.
You finished an All-Out Attack with a Fatal Counter in Arcade Mode or online.
You performed 100 Auto Combos in Arcade Mode or online.
You suffered a Persona Break in Arcade Mode or online. It happens to everybody...
You lost in Arcade Mode or online before you Awakened... That's sad. Here's a consolation prize.
You have completed 300 Challenges.
You have completed all of one character's Challenges!
You have reached Grade C in Ranked Matches.
You performed 50 Instant Blocks in Arcade Mode or online.
You've created a Title for your online matches.
You completed Arcade Mode with one character.
You defeated an opponent in Arcade Mode or online before he Awakened! Now, that's a real challenge!
You had a perfect victory in Arcade Mode or online.
You watched a Replay in the Theater. Are you as good as you remember?
You've earned your first online victory! You've bear-ly scratched the surface.
Have you burned your dread? Or reached out to the truth?
You spent 30 minutes in Training in one sitting. Now take it to the streets!
You have completed 150 Challenges.
You've aced all the tests.
Tuned In